Verizon Wireless Would Like to Estimate the Proportion of Households

Multiple Choice

Verizon Wireless would like to estimate the proportion of households that use cell phones for their phone service without a land line. A random sample of 150 households was selected and 48 relied strictly on cell phones for their service. The margin of error for a 90% confidence interval for the proportion based on this sample is ------.

A) 0.0561
B) 0.0627
C) 0.0333
D) 0.0475